Regulation the Properties of Materials on Magnesia Binder

Abstract:

Industrial waste pollution in the cities and the areas beyond them is a burning issue today. The only solution is recycling the by-products of primary production. Thus, the magnesia caustics are widely used in construction. However, their application is limited due to their high hygroscopicity. Many scientists were involved into the study of this problem justifying their achieved positive result by either using different types of sealers or introduction of fine composition active mineral additives into the binder. Moreover, all these studies mainly focused on the improvement of the water resistance of magnesia composites, while hygroscopic regulation was not significant. So it is important to study the process of environmental moisture accumulation in the pores of the magnesia material. When establishing the causes of the high hygroscopicity of magnesium materials, it was found that its value depends on environmental conditions (temperature, pressure and relative humidity); the specific surface area of magnesia stone; density of the sealer for magnesia binder; the chemical composition of various modifying additives and their influence on the properties of magnesia stone and materials based on it; the composition of the hydrated phases of magnesia stone with additives and without them; the presence of pores, their size and number in the structure of the stone; the surface charge of a magnesia stone. Studies have shown that high-strength water resistant chlorine magnesia stone in combination with modifying additives allows obtaining a composite material with hygroscopicity less than 2 %.

• Periodical: Solid State Phenomena (Volume 265)
• Pages: 856-861
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.265.856
• Online since: September 2017
• Authors: V.V. Zimich*
• Keywords: Environmental Conditions, Hygroscopicity, Industrial Regions, Magnesia Binder, Modifying Additives, Regulation of the Properties

References

[1] G.M. Badin, V.V. Verstov, V. Likhachev, A.F. Yudin, Construction production. Basic terms and definitions, Association of Construction Universities, Moscow, (2006).

[2] L.A. Schwartzman, M.A. Menkovsky, Physical and Colloid Chemistry, Chemistry, Moscow, (1981).

[3] V.M. Gorbanenko, L.Y. Kramar, B. Ya. Trofimov, A.S. Korolev, Theory and practice of modified magnesia cements, Vestnik of SUSU Construction materials and products. 5 (2001) 10-13.

[4] M.N. Grishina, V.K. Kozlova, T.F. Sweet, Phase composition of water-resistant magnesia stone, Collection Provisions of construction materials, AltSTU, Barnaul, (1997) 27-31.

[5] M.N. Grishina, V.K. Kozlova, T.F. Sweet, Volume changes during solidification mixed magnesia binders, Collection "Provisions of construction materials, AltSTU, Barnaul, (1997) 32-36.

[6] S.V. Nuzhdin, L. Ya. Kramar, B. Ya. Trofimov, Modified magnesia binders increased water resistance, Collection of scientific works, Nizhny Novgorod, (2002) 168-170.

[7] S.V. Nuzhdin, L. Ya. Kramar, B. Ya. Trofimov, Effective concrete on the modified magnesia binder, Collection of scientific works of the International Scientific and Technical Conference Composite construction materials. Theory and practice, Penza, (2003).

[8] M.A. Savinkina, A.T. Logvichenko, V.N. Zyryanov, Creating a water-resistant magnesia binder based on MgO and ash and slag thermal power plants, Power Station. 12 (1992) 11-13.

[9] T.A. Plekhanova, G.I. Yakovlev, Magnesia astringent, modified sulfate supplements, Building materials, equipment, technologies of XXI century. 34 (2006) 34-35.

[10] A.M. Kuznetsov, Production of caustic magnesite, Stroyizdat, Moskow, (1948).

[11] O.B. Adomavichutte, I.V. Janicki, About magnesia cement hardening, Vektaris. 12 (1962) 2551-2554.

[12] S.V. Erdman, Natural magnesium-silicates in the production of binders and ways to improve the water resistance of magnesia cementitious materials, Tomsk, (1996).

[13] M.P. Elinz, Sorel cement and salt, Building materials. 1 (1937) 43-47.

[14] O.A. Belimova, Magnesium binders based on sludge bisulfate solution - waste pulp and paper industry, Niicement, Moskow, (1999).

[15] S.I. Kilesso, A.V. Ivanova, Penomagnezit and a property of its production technology, Publishing municipal services of RSFSR, Moscow, (1974).

[16] V.V. Timashev, Y.M. Butt, M.M. Sychev, Chemical technology of knitting materials, Higher School, Moscow, (1980).

[17] B.P. Goncharov, Magnesium construction materials, Publishing house Gosstroiyizdat, Moscow, (1933).

[18] T.A. Plekhanov, Sulphate magnesia astringent, Kazan, (2005).

[19] L. Ya. Kramar, T.N. Chernych, B. Ya. Trofimov, Features hardening of magnesia binder, Cement and its Application. 9 (2006) 58-61.

[20] T.V. Grischuk, Construction materials and products, ABM Design, Minsk, (2004).